0 If you choke, or if something chokes you, you stop breathing because something is blocking your throat: --
1 to fill something such as a road or pipe, so that nothing can pass through: --
2 (usually in sports) to fail to do something at a time when it is urgent, usually because you suddenly lose confidence: --
He could score points at will during the qualifying matches, but in the final he completely choked.
3 a device in a motor vehicle that changes the amount of air going into the engine, allowing more fuel compared to air to go in and therefore making the engine easier to start --